Hoisting mechanism.



.PATENTED 001:. 11, 19.04.

s. EDLING.

HOISTING MECHANISM.

APPLICATION FILED JAN. 9. 1904.

I SHEETS-SHEET 1.

N0 MODEL.

% WQM INVENTOR ,g Wfi Z I Aflomey No. 772,138, 7 I PATENTED OCT. 11, 1904.

- S. BDLING.

HOISTING MECHANISM.

APPLICATION I ILBD JAN. 9' 1904.

WITNESSES: [NVENTGR WWW.

No. 772,138. r

UNITED STATES Patented October 11, 1904.

PATENT OFFICE.

SIGURD EDLING, BOSTON, MASSACHUSETTS.

HOISTING MECHANISM.

SPECIFICATION forming part of Letters Patent No. 772,138, dated October 11, 1904.

Application filed January 9, 1904.

To all whom, it may concern:

Be it known that I, SIGURD EDLING, residing at Boston, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Hoisting Mechanism; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same. a

This invention relates to hoisting mechanism; and it consists of an overhead trolley or carrier, as hereinafter fully described and claimed.

The object of the invention is to provide a trolley or carrier which is locked to the track automatically at intermediate points while the load is being raised or lowered.

In the drawings, Figure 1 is a side view of the trolley, showing the fall-block in its highest position. Fig. 2 is a cross-section taken on the line a m in Fig. 1. Fig. 3 is a side view similar to that shown in Fig. 1, but showing the trolley locked and the fall-block partially lowered.

A is an overhead track, and 1 is a carriage or frame provided with rollers 2, which run on the track. A sheave 3 is journaled in the frame, and 4: is the hoisting-rope, which passes over the sheave 3, under the sheave in the fall-block 5, and has its other end secured to the anchor-bar 6 in the frame. A rope 7 is provided for moving the trolley to the left; but when the track is inclined so that the trolley can run to the left by gravity this rope is not required. The track A has stops 8 secured to .it, and as many stops 8 as required are provided and are secured to it wherever the trolley is to be locked to it and at suitable intervals. At the left-hand end of the track a stop 8 is provided, which is a modification of the stops 8 in form, as will be more fully described hereinafter. The fall-block 5 is provided with an eye or loop 9, provided with laterally-projecting arms 9, which engage with guide-slots 11 in the side plates of the frame or carriage. A hook 10 is pivoted on a pin 12 in the frame and is provided with a finger 13 and two notches 14L and 15. The hook is arranged at the top of the slots 11.

' frame.

Serial No. 188.318. (No model.)

A locking-lever 17 is pivoted on a pin 16 in the frame and consists of two side pieces arranged outside the frame and cross pieces or pins which work in slots or openings in the The locking-lever is provided with a pin 18 at its lower part for engaging with the notches 14 and 15 of the hook, and it has a pin 19 at its upper part for engaging with the stops 8 and 8. The locking-lever 1'1 also has a pin 20 at its middle part, and 21 is a lever which is pivoted inside the frame upon the pin 20 and provided with'a roller 22 at its free end. A spring 25, secured to the frame 1, holds the lever 21 in a prearranged position and prevents it from dropping. The locking-lever is provided with a pin 23 above the lever 21 for the said lever to engage with. A tumbler 24 is pivoted in the frame 1 upon a pin 24', and 26 is a spring which controls the position of the said tumbler, being secured at one end to the frame and at the other end to an arm 26, which is operatively connected with the said tumbler. One arm of the tumbler is normally arranged in the path of the stops 8, and its other arm is then below the roller 22, as shown in Fig. 1. The stop 8 is similar to the stops 8, but has a hook-shaped projection 28 at its left-hand end.

The operation of the mechanism is as follows: When the parts are in the positions shown in Fig. 1., the fall-block is supported by the hook 10, which engages with the eye 9 and supports the load, so that the trolley can be moved along the track. When the trolley is moved to the left, as shown by the arrow in Fig. 1, the tumbler 24: strikes the end 5 of the stop 8 and turns the locking-lever 17 upward on its pivot by pressing the lever 21 upward against the pin 23. In its normal position the locking-lever 17 looks the hook 10 by engaging with its notch 14, so that the hook cannot be turned on its pivot by the weight of. the load; but when the locking-lever is turned upward on its pivot by the action of the stop 8 and lever 21 the pin 18 is raised out of the notch 14, so that the hook is free to turn on its pivot and perm-its the fall-block and the load supported by it to be lowered. The pin 19 at the upper part of the locking-lever is placed in engagement with the supports the lever 21 and its roller 22. When 1 the parts are in the positions shown in Fig. 3 and the load is hoisted, the eye 9 of the fallblock raises the finger 13 and engages with the hook 10, at the same time turning the said hook on its pivot-pin and permitting the locking-lever to descend by gravity to its original position, in which its pin 18 engages with the notch 14 and locks the hook. The roller 22 still remaining below the tumbler, the trolley can be moved farther to the left without being operated by the intervening stops 8, as these stops 8 will merely oscillate the tumbler when they strike it.- The tumbler is caused to reengage with the lever 21 when the trolley is moved to the right, as the upper arm of'the tumbler then strikes the end (Z of the next stop 8, so that the other arm of the tumbler is pressed down below the roller 22, the depression of the roller for this purpose being permitted by the spring 25. In order to obviate the necessity of running the trolley to the left past the end stop 8, the said end stop 8 is provided with a hookshaped projection 28, which engages with the pin 19 and operates the locking-lever 17.

In hoisting mechanism constructed as hereinbefore set forth the fall-block can be raised or lowered at any desired point along the track and at any number of points along the track by securing stops 8 at such points.

What I claim is 1. In hoisting mechanism, the combination, with a track, and a trolley which runs on the said track; of a hook for supporting the fallblock pivoted to the said trolley, a lockinglever for the said hook also pivoted to the said trolley, a lifting-lever pivoted to the said locking-lever, a spring-controlled tumbler for operating the said lifting-lever also pivoted to the said trolley, and a stop for operating the said tumbler secured to the said track.

2. In hoisting mechanism, the combination,

with a track, and a trolley which runs on the said track and which has guide-slots at its lower part; of a fall-block provided with an eye and arms for engaging with the said slots, asustaining-hook pivoted to the said trolley and engaging with the said eye and having a finger which projects across the said slots in the path of the said eye, a locking-lever for the said hook also pivoted to the said trolley, a stop secured to the said track, a lifting-lever pivoted to the said locking-lever, and a spring-controlled tumbler for operating the said lifting lever also pivoted to the said trolley and operated by contact with the said stop.

3. In hoisting mechanism, the combination, with a track, and a trolley which runs on the said track; of a hook for supporting the fallblock pivoted to the said trolley, a lockinglever for the said hook formed of two side plates pivoted outside the trolley and crosspins between the said side plates which pass through openings in the trolley-frame, a lifting-lever pivoted on one of the cross-pins of the said locking-lever, a pin on the saidlocking-lever for the said lifting-lever to engage with when moved upward, a spring for supporting the said lifting-lever in a prearranged position, a spring-controlled tumbler for operating the said lifting-lever also pivoted to the said trolley, and a stop for operating the said tumbler secured to the said track.

4. In hoisting mechanism, the combination, with a track, and a trolley which runs on the said track; of a hook for supporting'the fallblock pivoted to the said trolley, a lockinglever for the said hook also pivoted to the said trolley and provided with a pin at its upper end for locking the trolley to the said track, a lifting-lever pivoted to the said locking-lever, a spring-controlled tumbler for operating the said lifting-lever also pivoted to the said trolley, and a stop for operating the said tumbler secured to the said track and provided with a notch for the said pin at the upper end of the locking-lever to engage with when the said hook releases the fall-block.

In testimony whereof I aflix my signature in presence of two witnesses.

SIGURD EDLING. Witnesses A. J. MURRAY, FREDERICK K. DAGGETT. 

